2D/3D, mostly AutoCAD compatible:
Dassault DraftSight:
Graebert Ares Commander (there is Linux version too):
https://www.graebert.com/cad-software/ares-commander/
Bricsys BricsCAD (there is or was Linux version too):
Monstrous 3D CAD system, on league of its own - Dassault Catia:
https://www.3ds.com/products/catia
Architectural - Graphisoft Archicad:
https://graphisoft.com/solutions/archicad/
Architectural, engineering - Nemetschek Allplan:
I have designed multiple things with it.
Definitely not perfect, probably would have a difficult time in a commercial setting, but in the past 5 years has gotten a whole lot better!
It is kind of GIMP right now, I hope it gets to be like Blender as far as user experience.
Gosh I am currently trying really hard to learn blender but the UI doesn’t feel intuitive to me at all.
I super appreciate the power of the application and the open endedness but when I add an object and the camera suddenly seems to not show anything and I can’t move the camera, or some other random thing it happens it so damn difficult to determine where the problem is, it is like a synthesizer where most of the really important synthesizer functions are tiny little buttons put in different corners and critical functions are placed inconspiciously amongst fidgety, mostly auxillary functions.
I loveeee blender as an idea, its just damn there is like… not a very easy way to get my bearings it seems like and I have tackled learning allllll different kinds of software.
sigh not saying I am a genius or anything, I wish I was so I could get blender down and start focusing on making things